How can tartar and plaque be removed from teeth without grinding? is there any paste, etc. for it?
The girders of a suspension bridge form an arc. The definition of an arc is a curve or bowed shape, like a part of a circle. An example of an arc is a rainbow. To arc is defined as to make a curved shape or move in a curved path.
to produce ionization at a given temperature and pressure. That energy is known as the gas's breakdown potential. One example of an electric arc is a lightning bolt. In nature, two clouds can act as electrodes, or electric current may flow between a cloud and Earth's surface. In either case, current flows through the air, ionizing molecules of oxygen, nitrogen, and other gases in the atmosphere.